105866915539 has 16 divisors (see below), whose sum is σ = 133959926016. Its totient is φ = 81262447200.

The previous prime is 105866915501. The next prime is 105866915563. The reversal of 105866915539 is 935519668501.

It is not a de Polignac number, because 105866915539 - 2¹¹ = 105866913491 is a prime.

It is a super-2 number, since 2×105866915539² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105866915239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10255252 + ... + 10265569.

It is an arithmetic number, because the mean of its divisors is an integer number (8372495376).

Almost surely, 2^105866915539 is an apocalyptic number.

105866915539 is a deficient number, since it is larger than the sum of its proper divisors (28093010477).

105866915539 is a wasteful number, since it uses less digits than its factorization.

105866915539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20520906.

The product of its (nonzero) digits is 8748000, while the sum is 58.

The spelling of 105866915539 in words is "one hundred five billion, eight hundred sixty-six million, nine hundred fifteen thousand, five hundred thirty-nine".